Authorities in Colorado are hoping to interview the roommate of a Colorado bank employee who has been missing for nearly two weeks.

Police in Wheat Ridge, a western suburb of Denver, said there wasn't evidence to suspect foul play in the disappearance of Leann "Annie" Meyer, 52, however, they're perplexed that her roommate, Melissa Miller, is unwilling to meet police in person.

"We certainly think Melissa Miller has information that would be useful to us. We don't know if she knows where Annie is, but we would certainly like to speak with her," Wheat Ridge Police Cmdr. Dave Pickett said. "We don't have a criminal case at this point. We have no crime scene, no one telling us Ms. Meyer was in danger. This is still very much a missing persons case."

Authorities can't pinpoint the exact date Meyer -- or her two vehicles-- disappeared.

Miller called in sick for her roommate, who is employed by U.S. Bank, on Feb. 22, Pickett said. The next day, a friend reported speaking with Meyer on the phone. And on Feb. 25, a text message was sent from Meyer's phone to her employer, letting her employer know she would not be coming into work.

"She's real responsible. She's been at the same job for the last 15 years, never misses work. This is very unlike her to not have spoken to anyone," Meyer's friend, Luann Joecken, told ABCNews.com. "I have no reason to believe [Melissa] would harm Annie in any way, but the fact she is not coming forward makes me suspicious."

On Thursday, authorities searched the women's shared residence for a third time. Miller has not returned to the home she shared with Meyer since police became involved on March 4, Pickett said.

She told authorities over the phone that her roommate left with a woman named Cathy, police said, but Joecken said she was skeptical.

"I've known her for 28 years. She has never once mentioned this Cathy person to me," Joecken told ABCNews.com. "I've been talking to people for the past four days, and no one has ever heard of her."

Meyer's absence is particularly stinging for her friends, who would have celebrated her 52nd birthday with her today.

Instead of a birthday celebration, they are organizing search parties. Joecken and a group plan to search the area on Saturday for signs of their friend, and to hand out flyers, if bad weather does not get in the way.

"It's extremely stressful. I just wish there was something I could do," Joecken said. "We're having a search for her tomorrow, but we're expecting bad weather, so it may be delayed. I'm very upset."